feat: add standalone prometheus monitor (#333)

* feat: add generate standalone prometheus monitor

Signed-off-by: liyang <[email protected]>

* add standalone prometheue monitor example

Signed-off-by: liyang <[email protected]>

---------

Signed-off-by: liyang <[email protected]>

Author: daviderli614

controllers/greptimedbstandalone/deployer.go

@@ -80,6 +80,7 @@ func (d *StandaloneDeployer) Generate(crdObject client.Object) ([]client.Object,
 		BuildService().
 		BuildConfigMap().
 		BuildStatefulSet().
+		BuildPodMonitor().
 		SetControllerAndAnnotation().
 		Generate()
 
@@ -279,6 +280,30 @@ func (b *standaloneBuilder) BuildStatefulSet() deployer.Builder {
 	return b
 }
 
+func (b *standaloneBuilder) BuildPodMonitor() deployer.Builder {
+	if b.Err != nil {
+		return b
+	}
+
+	if b.standalone == nil {
+		return b
+	}
+
+	if b.standalone.Spec.PrometheusMonitor == nil || !b.standalone.Spec.PrometheusMonitor.Enabled {
+		return b
+	}
+
+	pm, err := common.GeneratePodMonitor(b.standalone.Namespace, common.ResourceName(b.standalone.Name, v1alpha1.StandaloneRoleKind), b.standalone.Spec.PrometheusMonitor)
+	if err != nil {
+		b.Err = err
+		return b
+	}
+
+	b.Objects = append(b.Objects, pm)
+
+	return b
+}
+
 func (b *standaloneBuilder) generatePodTemplateSpec() corev1.PodTemplateSpec {
 	template := common.GeneratePodTemplateSpec(v1alpha1.StandaloneRoleKind, b.standalone.Spec.Base)
 

examples/README.md

@@ -35,3 +35,4 @@ The following examples suppose that you have installed the etcd cluster in the `
 - [OSS](./standalone/oss/standalone.yaml): Create a GreptimeDB standalone with Aliyun OSS storage.
 - [AZBlob](./standalone/azblob/standalone.yaml): Create a GreptimeDB standalone with Azure Blob storage.
 - [Configure Tracing](./standalone/configure-tracing/standalone.yaml): Create a GreptimeDB standalone with custom tracing configuration.
+- [Prometheus Monitoring](./standalone/prometheus-monitor/standalone.yaml): Create a GreptimeDB standalone with Prometheus monitoring. Please ensure you have already installed prometheus-operator and created a Prometheus instance with the label `release=prometheus`.

examples/standalone/prometheus-monitor/standalone.yaml

@@ -0,0 +1,13 @@
+apiVersion: greptime.io/v1alpha1
+kind: GreptimeDBStandalone
+metadata:
+  name: basic
+spec:
+  base:
+    main:
+      image: greptime/greptimedb:latest
+  prometheusMonitor: # Make sure you have already installed prometheus-operator and created a Prometheus instance with the label `release=prometheus`.
+    enabled: true
+    interval: "30s"
+    labels:
+      release: prometheus